U2 MD ActionButton: Proper show/hide for .isAvailable().
U2 MD ActionButton: Proper show/hide for .isAvailable().

foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,mdittmer/foam,foam-framework/foam,mdittmer/foam,foam-framework/foam,foam-framework/foam,mdittmer/foam,jlhughes/foam,mdittmer/foam,jlhughes/foam